[
  "Draw a bar for the marbles. Paul takes 1/2. 1/2 remains. Han takes 3/4 of remainder = 3/8.",
  "After Han: 1/2 - 3/8 = 1/8. Nick takes 1/5 of 1/8 = 1/40.",
  "Lionel gave 1/40 of the marbles to Nick. Answer: B."
]